IIRC, one process cannot send a Unix signal to another one. At least, not any more, and not without special privileges.
But would it be possible for a user to send a SIGUSR1 (using 'kill -30 <pid>' on the command line) to a process they own? I couldn't find information about that. In fact, in the developer docs i couldn't find any info about Unix signals, what is possible or not under the new security regime in macOS. (I can't remember where i read about the new limitations regarding signals under the new security regime.) Any info will be highly appreciated. Best regards, Gabriel
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